Ready-to-use ELISA kits are available for the detection of GPCR43, an alias of the protein, free fatty acid receptor 2. The official gene symbol is FFAR2. The kits can detect several species variants of the protein, including: mouse and rat. The protein, with a mass of 37.1 kDa and length of 330 residues, is reported to be membrane-associated. It is a member of the G-protein coupled receptor 1 family and may be known by other names, including: FFA2R, free fatty acid activated receptor 2, fatty acid receptor 2, and G-protein coupled receptor 43.